Glassware forming machine



May 17,1932. H. A. RoHRlcH 1,859,053

. GLAsswARE FORM'ING MACHINE Filed July 10. 1929 J l l I l i U IE-E zr l l J3 J :mgl/'Illa E SW1/tez 'Patented May 17, 1932A A UNITED STATES PATENT Loi-*FICE v HAROLD A. ROHRICH, OF TOLEDO, OHIO, ASSIGNOR l'1.0 OWENS-ILLDN'OIS GLASS COM PANY, OF TOLEDO, OHIO, A CORPORATION F OHIO GLASSWARE FORIMING MACHINE Application led July 10,

My invention relates to improvements in glassware forming machines andmore particularly to the cutofrn or charge severing mechanism employed to separate the mold charges of molten glass in the gathering molds, from the main supply body of glass.

An object of the present invention is to provide a cutoft' mechanism, in which the speed of'travel of the knife during its cut- 0 ting stroke is entirely independent of the rotary speed of the mold carriage. Ordinarily,- variations in the speed of rotation of the mold carriage directly affect the operating speed of the cuto knife. For example, a de- 5 crease in the rotary speed of the mold carriage slows down operation of the cutoff knife so that it cannot effect a clean severance of the glass. `This condition is reflected in poor bottom construction in the nished articles 3 of glassware. My invention provides for operation of the cutoff knife at a constant high speed without regard to the movement of the mold carriage.

Another object is to provide means to im- 5 part an exceptionally high speed movementl to the cutoff knife, so that a clean severance of the glass may be obtained without requiring contact between the knifev and the bottom of the mold. Thus, wear and tear on l the knife and mold are materially reduced as compared to present day practice in which the knife slidingly contacts with the charging end of the mold.

Other objects will be in part apparent and in part pointed out hereinafter.

In the drawings:

Fig. 1 is a fragmentary plan view illustrating my improved cutoff mechanism.

Fig. 2 is a fragmentary side elevatlon with parts in section.

Fig. 3 is a detail sectional elevational showing part of the means for holding the [spring compressed. l

Flg. 4 is a sectional view taken along the line IV-IV of Fig. 2.V

In the drawings illustrating the preferred embodimentV of my invention', the cutoff mechanism is shown in conjunction with a glass blowing machine whose blank molds 5 are adapted to be brought into contact with 1929. SerialNo. 377,149.

a supply body of molten glass (not shown) at regular time intervals to gather measured quantities of glass by suction. Each blank mold 5 cooperates with a neck mold l6 and blowing head 7, the latter suitably connect- 55 ed to a vertical hinge pin 8. These elements are mounted upon a rotary mold carriage 9, including frames individual to the molds. The mold carriage 9 is rotatably supported upon a stationary central column 11, upon so which is mounted a circular cam table 12. Reference may be had to La France patent, Number 1,185,687, dated June 6, 1916, for additional details of the machine with which my cutoff mechanism is illustrated.

For the greater part the illustrated cutoff mechanism is of standard construction, in `that it includes a knife 13 supported at the lower end of a vertical rock shaft 14, the latter mounted fol` oscillation and reciproca- 70 tion in a bearing 15 at the outer end of a bracket arm 16 secured to and extending horizontally outward from one of the frames-10. J The knife 13 is alternately raised and lowered by mechanism including a bell crank lever 17 75 pivoted to the arm 16. One end of this lever carries a yoke 18 or fork suitably connected to the rock shaft 14 in a well known manner, said lever being pivoted at its other end to a connector rod 19 which extends radially in- 80 ward and has yielding connection to a slide 20. A cam roll 21 carried by the slide 20 runs in a 4stationary cam 22 on the upper side of the table 12, said cam being so shaped that ,it rocks the lever 17 at regular time intervals 85 and thereby alternately raises and lowers the shaft 14 and cutoff knife 13.

In order to provide for exceptionally high speed operation of the cutoff knife 13 withoutY regard to the rotary speed Vof the mold lcar- 90 riage, a construction substantially as follows is employed. Rack and pinion mechanism 23 is arranged at the upper end of the rock shaft 14, said mechanism including a pinion 24 splined to the shaft 14 and running in'mesh 95 with a rack bar y25 suitably connected to the outer end of a rod 26 or bar which extends radially inward and is rigidlyzsecured to a slide 27 mounted for radial reciprocation in a. 'horizontal slideway 28. A cam roll 2 9 (Fig. 10U

2) is carried by the slide 27 and runs in a stationary cam 30 spaced radially outward from the cam 22 on the table 12. A major portion of the cam 30 is so positioned that it holds the slide 27 in its mnermost radial position so that the knife 13 is disposed at one side of the mold 5. At the charge severing or cutoff position (Fig. 1) the outer wall of the cam 30 is cut away for a short distance so that the slide l27, may move radially outward under influence of a coil spring 31 and thereby swing the knife 13 laterally across the lower` end of the blank or gathering mold 5. The coil spring 31 encircles the rod 26 between a stationary collar 3 2 secured to the rod and a cross bar 33 having an apertured extension 34 through which said rod slidingly extends. This bar 33 is connected through uprights 35 to the slideway 28 (Fig. 4), the latter in turn being4 rigidly secured to a part lof the rotary mold carriage. A cup 36 mounted on the cross bar 33 and a piston 37 or head carried by the slide 27 constitute a dash pot which cushions stopping of outward movement of the slide 27 under influence of the spring 31.

While the mold carriage is rotating, and immediately following completion of a cutoff operation, the cam roll 29 carried by the slide 27' enters the cam 30 by way of an angular portion38 (Fig. 1), the latter causing radial inward movement of the slide to move the knife 13 to a position at one side of the mold Thismovement of the slide compresses the spring 31 preparatory to starting another cutoff operation. After the cam roll 29 reaches the cutoff position and passes beyond the holding influence of the cam 30, the s rin 31 is permitted to expand quickly and t ere y move the rod 26 radlally outward and cause a lateral movement of the knife 13 y across the lower end of the mold. The exact point at which the spring 31. is permitted to 4expand and thereby actuate the knife 13 is regulated and controlled by a short cam 39 spaced radially outward from the cam 30 and operating to release the slide 27 from locking engagement with a latch 40. This latch 40 is secured to a rock shaft 41 journaled in horizontally aligned bearings 42 on the lower side of the slideways 28. A lever 43 is secured to the latch and carries a cam roll 44 adapted to engage the cam 39 in order to release the slide 27 for outward movement under iniluence of the spring 31. The latchisyieldingly held in engagement with the outer end of the slide 27 when the latter is in its innermost position, by means of a coil spring 45 which connects an arm 46 onone end of the rock shaft to a finger 47 on one of the slideways 28.

From the foregoing description it is understoodthat after the cam rolll 29 reaches the open portion of the cam 30, the lever 43 of the latch is moved radially inward about the assente l axis of the shaft 41 due to engagement with the cam 39. Such movement of the lever swings the latch 40 downwardly away from,

the slide 27 and permits the spring 3l to expand quickly and move the slide 27 and rod radially outward. rIhus, the rack and pinion mechanism 23 is actuated and the knife 13 is swung laterally across the lower end of the blank or gathering mold 5.

Immediately following the charge severing operation, the bell crank lever 17 may be rocked to change the relative vertical positions of the knife and blank mold, preparaing a knife, a vertical rock shaft supporting the knife, means including a spring device for rocking the shaft in one direction, cam

controlled means to move the knife in the other direction and tension the spring device for the next succeeding cutoff. operation, and

means to cushion stopping of the knife move-- ment in one direction.

2. In combination, a blank mold mounted for movement in a closed `horizontal ath, cut-ofi mechanism individual to the mol and movable therewith, said mechanism including p a knife, a vertical rock shaftsupporting the knife, rack and pinion mechanism for oscillating the shaft and thereby moving the knife back and forth across one end of the mold, a slide, push rod connection between the slide'and rack, a guide for the rod arranged between the slide and rack, a coil spring encircling the rod between the guide and rack, a stationary cam operating through the slide and rack and pinion mechanism to move the knife in one direction and simultaneously compress said spring, means for holding the spring compressed until a predetermined station is reached, and means for releasing the spring at said station to cause movement of the knife.

3. In combination, a blank mold mounted for movement in a closed horizontal path, cutoff mechanism individual to the mold and movable therewith, said mechanism includi ing the-knife, a vertical rock shaft supporting the knife, rack and pinion mechanism for oscillating the shaft and thereby movin the knife back and forth across one end o the mold, a slide, push rod connection between n the slide and rack, a guide for the rod arranged between the slide and rack, a coil spring encircling the rod between the guide and rack, a Vstationary cam operating through the slide and rack and pinion mechanism to move the knife in one direction and simultai of the kmfe,

nately raising and lowering the knife.

neously compress said spring, a latch device for holding the slide in position to maintain compression of the spring, and a stationary cam arranged to actuate the latch at said station whereby the spring operates through the rack and pinion mechanism ycausing movement of the knife in one direction.

4. In combination, a blank mold mounted for movement in a closed horizontal path, cutofl mechanism individual to the mold and movable'therewith, said mechanism including the knife, a -vertical rock shaft supporting the knife, rack and pinion mechanism for oscillating the shaft and thereby movin the knife back and forth across one end o the mold, a slide, push rod connection between the slide and rack, a guide for the rod arranged between the slide and rack, a coil spring encircling the rod between the guide and rack, a` stationary cam operating through the slide and rack and pinion mec anism to move the knife in one direction and simultaneously compress said spring, means for holding the spring compressedl until apredeter'-I mined station is reached, means for releasingI said station to causemovement lthe spring at and automatic means for alter- 5. In combination, a blank mold m unted for movement in a closed'horizontal pa h, cutoifl mechanism individual to the mold and movable therewith, said mechanism including the knife, a vertical rock shaft supporting theknife, rack and pinion mechanism for oscillating the shaft and thereby moving the f knife back and forth across one end of the mold, a slide, ush rod connection between the slide and rac a guidefor the rod arranged between the slide and rack, a coil spring encircling the rod between the guide and rack, a stationary camoperating through the slide y and rack and pinion mechanism to move the knife in one direction and simultaneously compress said spring, a latch device 4for hol ing the slide in position to maintain compression of the spring, a stationary cam arranged to actuate the latch at 'said,station whereby the spring operates through the rack and pin-fv ion mechanism causing movement of the knife in one direction, and means carried by the uide and slide to cushion stopping of the l 'fe movement in one direction..

Signed at Toledo, Ohio, this 6th day of Ju1y,1929.

- HAROLD A. ROHRICH. 

